Oracle 12C Documentation link

Here is the link to the new Oracle 12C documentation.
http://www.oracle.com/pls/db121/homepage
The DB software for is available for download at the usual site. This initial release is just the 64 bit versions: Linux x86-64, Solaris x86-64, Solaris on Sparc 64 bit

Hi,
see if the following page has the info you need.
Reference
http://www.oracle.com/technetwork/developer-tools/forms/documentation/10g-forms-091309.html
This one is for 6i but maybe is enough for what you are looking for.
Reference
http://download.oracle.com/otn_hosted_doc/forms/forms/A73074_01.pdf
Thanks, Roberto

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Hi Mark,
The site may have been unavailable for a short time. The links function correctly for me at the moment. Please confirm if you are still having this issue.
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Oracle 12c docs

Hi,
where we can find oracle 12c documention and its tutorials?
thanks,
DBC.

dbc001 wrote:
Hi,
where we can find oracle 12c documention and its tutorials?
thanks,
DBC.simple Google search you will get the below doc library.
http://docs.oracle.com/cd/E24628_01/index.htm

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Pre-loading Oracle text in memory with Oracle 12c

There is a white paper from Roger Ford that explains how to load the Oracle index in memory : http://www.oracle.com/technetwork/database/enterprise-edition/mem-load-082296.html
In our application, Oracle 12c, we are indexing a big XML field (which is stored as XMLType with storage secure file) with the PATH_SECTION_GROUP. If I don't load the I table (DR$..$I) into memory using the technique explained in the white paper then I cannot have decent performance (and especially not predictable performance, it looks like if the blocks from the TOKEN_INFO columns are not memory then performance can fall sharply)
But after migrating to oracle 12c, I got a different problem, which I can reproduce: when I create the index it is relatively small (as seen with ctx_report.index_size) and by applying the technique from the whitepaper, I can pin the DR$ I table into memory. But as soon as I do a ctx_ddl.optimize_index('Index','REBUILD') the size becomes much bigger and I can't pin the index in memory. Not sure if it is bug or not.
What I found as work-around is to build the index with the following storage options:
ctx_ddl.create_preference('TEST_STO','BASIC_STORAGE');
ctx_ddl.set_attribute ('TEST_STO', 'BIG_IO', 'YES' );
ctx_ddl.set_attribute ('TEST_STO', 'SEPARATE_OFFSETS', 'NO' );
so that the token_info column will be stored in a secure file. Then I can change the storage of that column to put it in the keep buffer cache, and write a procedure to read the LOB so that it will be loaded in the keep cache. The size of the LOB column is more or less the same as when creating the index without the BIG_IO option but it remains constant even after a ctx_dll.optimize_index. The procedure to read the LOB and to load it into the cache is very similar to the loaddollarR procedure from the white paper.
Because of the SDATA section, there is a new DR table (S table) and an IOT on top of it. This is not documented in the white paper (the white paper was written for Oracle 10g). In my case this DR$ S table is much used, and the IOT also, but putting it in the keep cache is not as important as the token_info column of the DR I table. A final note: doing SEPARATE_OFFSETS = 'YES' was very bad in my case, the combined size of the two columns is much bigger than having only the TOKEN_INFO column and both columns are read.
Here is an example on how to reproduce the problem with the size increasing when doing ctx_optimize
1. create the table
drop table test;
CREATE TABLE test
(ID NUMBER(9,0) NOT NULL ENABLE,
XML_DATA XMLTYPE
XMLTYPE COLUMN XML_DATA STORE AS SECUREFILE BINARY XML (tablespace users disable storage in row);
2. insert a few records
insert into test values(1,'<Book><TITLE>Tale of Two Cities</TITLE>It was the best of times.<Author NAME="Charles Dickens"> Born in England in the town, Stratford_Upon_Avon </Author></Book>');
insert into test values(2,'<BOOK><TITLE>The House of Mirth</TITLE>Written in 1905<Author NAME="Edith Wharton"> Wharton was born to George Frederic Jones and Lucretia Stevens Rhinelander in New York City.</Author></BOOK>');
insert into test values(3,'<BOOK><TITLE>Age of innocence</TITLE>She got a prize for it.<Author NAME="Edith Wharton"> Wharton was born to George Frederic Jones and Lucretia Stevens Rhinelander in New York City.</Author></BOOK>');
3. create the text index
drop index i_test;
exec ctx_ddl.create_section_group('TEST_SGP','PATH_SECTION_GROUP');
begin
CTX_DDL.ADD_SDATA_SECTION(group_name => 'TEST_SGP',
                            section_name => 'SData_02',
                            tag => 'SData_02',
                            datatype => 'varchar2');
end;
exec ctx_ddl.create_preference('TEST_STO','BASIC_STORAGE');
exec ctx_ddl.set_attribute('TEST_STO','I_TABLE_CLAUSE','tablespace USERS storage (initial 64K)');
exec ctx_ddl.set_attribute('TEST_STO','I_INDEX_CLAUSE','tablespace USERS storage (initial 64K) compress 2');
exec ctx_ddl.set_attribute ('TEST_STO', 'BIG_IO', 'NO' );
exec ctx_ddl.set_attribute ('TEST_STO', 'SEPARATE_OFFSETS', 'NO' );
create index I_TEST
on TEST (XML_DATA)
indextype is ctxsys.context
parameters('
    section group   "TEST_SGP"
    storage         "TEST_STO"
') parallel 2;
4. check the index size
select ctx_report.index_size('I_TEST') from dual;
it says :
TOTALS FOR INDEX TEST.I_TEST
TOTAL BLOCKS ALLOCATED:                                                104
TOTAL BLOCKS USED:                                                      72
TOTAL BYTES ALLOCATED:                                 851,968 (832.00 KB)
TOTAL BYTES USED:                                      589,824 (576.00 KB)
4. optimize the index
exec ctx_ddl.optimize_index('I_TEST','REBUILD');
and now recompute the size, it says
TOTALS FOR INDEX TEST.I_TEST
TOTAL BLOCKS ALLOCATED:                                               1112
TOTAL BLOCKS USED:                                                    1080
TOTAL BYTES ALLOCATED:                                 9,109,504 (8.69 MB)
TOTAL BYTES USED:                                      8,847,360 (8.44 MB)
which shows that it went from 576KB to 8.44MB. With a big index the difference is not so big, but still from 14G to 19G.
5. Workaround: use the BIG_IO option, so that the token_info column of the DR$ I table will be stored in a secure file and the size will stay relatively small. Then you can load this column in the cache using a procedure similar to
alter table DR$I_TEST$I storage (buffer_pool keep);
alter table dr$i_test$i modify lob(token_info) (cache storage (buffer_pool keep));
rem: now we must read the lob so that it will be loaded in the keep buffer pool, use the prccedure below
create or replace procedure loadTokenInfo is
type c_type is ref cursor;
c2 c_type;
s varchar2(2000);
b blob;
buff varchar2(100);
siz number;
off number;
cntr number;
begin
    s := 'select token_info from DR$i_test$I';
    open c2 for s;
    loop
       fetch c2 into b;
       exit when c2%notfound;
       siz := 10;
       off := 1;
       cntr := 0;
       if dbms_lob.getlength(b) > 0 then
         begin
           loop
             dbms_lob.read(b, siz, off, buff);
             cntr := cntr + 1;
             off := off + 4096;
           end loop;
         exception when no_data_found then
           if cntr > 0 then
             dbms_output.put_line('4K chunks fetched: '||cntr);
           end if;
         end;
       end if;
    end loop;
end;
Rgds, Pierre

I have been working a lot on that issue recently, I can give some more info.
First I totally agree with you, I don't like to use the keep_pool and I would love to avoid it. On the other hand, we have a specific use case : 90% of the activity in the DB is done by queuing and dbms_scheduler jobs where response time does not matter. All those processes are probably filling the buffer cache. We have a customer facing application that uses the text index to search the database : performance is critical for them.
What kind of performance do you have with your application ?
In my case, I have learned the hard way that having the index in memory (the DR$I table in fact) is the key : if it is not, then performance is poor. I find it reasonable to pin the DR$I table in memory and if you look at competitors this is what they do. With MongoDB they explicitly says that the index must be in memory. With elasticsearch, they use JVM's that are also in memory. And effectively, if you look at the awr report, you will see that Oracle is continuously accessing the DR$I table, there is a SQL similar to
SELECT /*+ DYNAMIC_SAMPLING(0) INDEX(i) */
TOKEN_FIRST, TOKEN_LAST, TOKEN_COUNT, ROWID
FROM DR$idxname$I
WHERE TOKEN_TEXT = :word AND TOKEN_TYPE = :wtype
ORDER BY TOKEN_TEXT, TOKEN_TYPE, TOKEN_FIRST
which is continuously done.
I think that the algorithm used by Oracle to keep blocks in cache is too complex. A just realized that in 12.1.0.2 (was released last week) there is finally a "killer" functionality, the in-memory parameters, with which you can pin tables or columns in memory with compression, etc. this looks ideal for the text index, I hope that R. Ford will finally update his white paper :-)
But my other problem was that the optimize_index in REBUILD mode caused the DR$I table to double in size : it seems crazy that this was closed as not a bug but it was and I can't do anything about it. It is a bug in my opinion, because the create index command and "alter index rebuild" command both result in a much smaller index, so why would the guys that developped the optimize function (is it another team, using another algorithm ?) make the index two times bigger ?
And for that the track I have been following is to put the index in a 16K tablespace : in this case the space used by the index remains more or less flat (increases but much more reasonably). The difficulty here is to pin the index in memory because the trick of R. Ford was not working anymore.
What worked:
first set the keep_pool to zero and set the db_16k_cache_size to instead. Then change the storage preference to make sure that everything you want to cache (mostly the DR$I) table come in the tablespace with the non-standard block size of 16k.
Then comes the tricky part : the pre-loading of the data in the buffer cache. The problem is that with Oracle 12c, Oracle will use direct_path_read for FTS which basically means that it bypasses the cache and read directory from file to the PGA !!! There is an event to avoid that, I was lucky to find it on a blog (I can't remember which, sorry for the credit).
I ended-up doing that. the events to 10949 is to avoid the direct path reads issue.
alter session set events '10949 trace name context forever, level 1';
alter table DR#idxname0001$I cache;
alter table DR#idxname0002$I cache;
alter table DR#idxname0003$I cache;
SELECT /*+ FULL(ITAB) CACHE(ITAB) */ SUM(TOKEN_COUNT), SUM(LENGTH(TOKEN_INFO)) FROM DR#idxname0001$I;
SELECT /*+ FULL(ITAB) CACHE(ITAB) */ SUM(TOKEN_COUNT), SUM(LENGTH(TOKEN_INFO)) FROM DR#idxname0002$I;
SELECT /*+ FULL(ITAB) CACHE(ITAB) */ SUM(TOKEN_COUNT), SUM(LENGTH(TOKEN_INFO)) FROM DR#idxname0003$I;
SELECT /*+ INDEX(ITAB) CACHE(ITAB) */ SUM(LENGTH(TOKEN_TEXT)) FROM DR#idxname0001$I ITAB;
SELECT /*+ INDEX(ITAB) CACHE(ITAB) */ SUM(LENGTH(TOKEN_TEXT)) FROM DR#idxname0002$I ITAB;
SELECT /*+ INDEX(ITAB) CACHE(ITAB) */ SUM(LENGTH(TOKEN_TEXT)) FROM DR#idxname0003$I ITAB;
It worked. With a big relief I expected to take some time out, but there was a last surprise. The command
exec ctx_ddl.optimize_index(idx_name=>'idxname',part_name=>'partname',optlevel=>'REBUILD');
gqve the following
ERROR at line 1:
ORA-20000: Oracle Text error:
DRG-50857: oracle error in drftoptrebxch
ORA-14097: column type or size mismatch in ALTER TABLE EXCHANGE PARTITION
ORA-06512: at "CTXSYS.DRUE", line 160
ORA-06512: at "CTXSYS.CTX_DDL", line 1141
ORA-06512: at line 1
Which is very much exactly described in a metalink note 1645634.1 but in the case of a non-partitioned index. The work-around given seemed very logical but it did not work in the case of a partitioned index. After experimenting, I found out that the bug occurs when the partitioned index is created with dbms_pclxutil.build_part_index procedure (this enables enables intra-partition parallelism in the index creation process). This is a very annoying and stupid bug, maybe there is a work-around, but did not find it on metalink
Other points of attention with the text index creation (stuff that surprised me at first !) ;
- if you use the dbms_pclxutil package, then the ctx_output logging does not work, because the index is created immediately and then populated in the background via dbms_jobs.
- this in combination with the fact that if you are on a RAC, you won't see any activity on the box can be very frightening : this is because oracle can choose to start the workers on the other node.
I understand much better how the text indexing works, I think it is a great technology which can scale via partitioning. But like always the design of the application is crucial, most of our problems come from the fact that we did not choose the right sectioning (we choosed PATH_SECTION_GROUP while XML_SECTION_GROUP is so much better IMO). Maybe later I can convince the dev to change the sectionining, especially because SDATA and MDATA section are not supported with PATCH_SECTION_GROUP (although it seems to work, even though we had one occurence of a bad result linked to the existence of SDATA in the index definition). Also the whole problematic of mixed structured/unstructured searches is completly tackled if one use XML_SECTION_GROUP with MDATA/SDATA (but of course the app was written for Oracle 10...)
Regards, Pierre

Run apex in oracle 12c

i try to install apex in oracle 12c but it told me it's already installed
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it give me {"message": "Resource not found.", "type": "NoSuchResource", "brief": "error"}
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Hi,
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Help on install ORE 1.4 for Oracle 12c on Windows

Hi,
Can someone help me to install ORE 1.4 for oracle 12c.
Thanks,
Allan

Hi Allan,
Here is the link to the Oracle R Enterprise 1.4 Documentation. The Oracle R Enterprise Installation Guide contains an overview of the installation process and a step-by-step installation session (see Appendix A). Feel free to post any questions you have during the installation here.
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Hi,
I tried to install oracle 12c in my laptop. but installation is finised successfully. i could not create a database yet. can any one please help ?

Pl post exact OS versions and the complete error messages you encountered - have you followed all of the steps in the Install guide ? Oracle Database Online Documentation 12c Release 1 (12.1)
HTH
Srini

What are the Oracle Home and GRID home directory locations for Oracle 12c (12.1.0.5) release

Hello All,
I plan to install and configure Oracle 12c Cloud Control console on a single standalone server and the version is Oracle 12.1.0.5. All the databases which are installed across in the entire farm/landscape are these versions:
Oracle 10.2.0.3 Enterprise Edition
Oracle 10.2.0.4 Enterprise Edition
Oracle 10.2.0.4 Active DataGuard Enterprise Edition
Oracle 10.2.0.5 Enterprise Edition
Oracle 11.2.0.1 Enterprise Edition
Oracle 11.2.0.1 Active DataGuard Enterprise Edition
Oracle 11.2.0.3 RAC Enterprise Edition
All Oracle databases across these versions will use the same version of Oracle Grid since ASM is used for all the Oracle database across Production/Test/Development databases. The OS is RHEL 5.8, RHEL 6.3, OEL 6.3 versions.
When installing the Oracle 12c Cloud Control what is the Oracle and Grid Home directory location need to set to. Please let me know if there are any other additional configurations needed?
Looking forward to hearing from you soon.
Regards,
Abhijit

First off, the only EM CC release out right now is 12.1.0.2, not sure where you got 12.1.0.5 (DB Plugin maybe?).
Second, you're confusing EM CC homes with DB/Grid homes.
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Scott schema not included in Oracle 12c?

I just downloaded Oracle 12c however I noticed that there's no scott.sql in the oracle directories.. (/rdbms/admin/scott.sql)
Tried downloading scott.sql and add but it wasn't added successfully as I checked for scott username from dba_users as said in this guide: Oracle Training - Oracle Video Tutorial | Installing the SCOTT schema | Oracle Tutorials - YouTube
Is there anyway to add it?
I also needed the other tables EMP, DEPT, etc.. for my final project.
Thank you!

That is not an official Oracle video, so the content is questionable.
I have not installed 12c personally, but this link may be helpful - Contents
HTH
Srini

Documentation links broken?

The Documentation link on the Database Home Page takes me to a page with links to the Oracle XE documentation.
All of those links seem to be broken.

Yes - I was just about to amend my previous response. All the links from the XE documentation home page are broken.
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I wonder what Oracle's policy is about partners and customers mirroring the docco?
Message was edited by:
forbrich

Documentation Links are bad

The documentation links for Discoverer are bad (I would assume this applies to other documentation.
None of the HTML or PDF links on this page return a valid result:
http://www.oracle.com/technology/documentation/discoverer.html
They all return: "The page cannot be displayed"
Please remedy ASAP.
Damon Runion
Oracle Consulting

Just to clarify here; software downloads (from download.oracle.com) will not work for employees during business hours but documentation will - if you remove *.oracle.com from your browsers proxy exceptions.
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Oracle 12c installation failed in Ubuntu 13.10

I understand that Ubuntu is not supported platform for installing Oracle rdbms's. Managed to install the earlier versions in it.
OS & GCC version:
vivek@vivek-idc:~/Documents/Oracle12c/1201/bin$ cat /proc/version
Linux version 3.11.0-12-generic (buildd@allspice) (gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-10ubuntu7) ) #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013
Iam trying to install Oracle 12c on Ubuntu 13.10 and getting the below error:
make -f /home/vivek/Documents/Oracle12c/1201/precomp/lib/ins_precomp.mk relink EXENAME=proc
make[1]: Entering directory `/home/vivek/Documents/Oracle12c/1201/precomp/lib'
Linking /home/vivek/Documents/Oracle12c/1201/precomp/lib/proc
INFO: /usr/bin/ld: /home/vivek/Documents/Oracle12c/1201/lib//libnls12.a(lxhlang.o): undefined reference to symbol '__tls_get_addr@@GLIBC_2.3'
/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
INFO: /bin/chmod: cannot access ‘/home/vivek/Documents/Oracle12c/1201/precomp/lib/proc’: No such file or directory
INFO: make[1]: *** [/home/vivek/Documents/Oracle12c/1201/precomp/lib/proc] Error 1
INFO: make[1]: Leaving directory `/home/vivek/Documents/Oracle12c/1201/precomp/lib'
INFO: make: *** [proc] Error 2
INFO: End output from spawned process.
INFO: ----------------------------------
INFO: Exception thrown from action: make
Exception Name: MakefileException
Exception String: Error in invoking target 'links proc gen_pcscfg procob' of makefile '/home/vivek/Documents/Oracle12c/1201/precomp/lib/ins_precomp.mk'. See '/home/vivek/oraInventory/logs/installActions2013-10-24_08-18-59PM.log' for details.
Exception Severity: 1
Any ideas on this is appreciated.

vivi wrote:
Thanks Srini for taking your time to respond.
I understand this is an unsupported OS, however was checking if anyone had encountered a similar issue and went through with it.
Just dont want to switch this OS which iam using it for a while to get through. Considerably, I have the option of having this on oracle virtual machine to set it up allowing my OS to eat up a good amount of resources
Thanks
Vivek
How much real memory does your ubuntu machine have?
How much memory do you really need to allocate to the virtual machine?
Really?
What "resources" do you expect to be eaten up by running a single vm guest on an Ubuntu host?
I run a full suite of vm's on my Win7 Pro host. I size the vm's at 2gb each and, with 8gb of real memory on the silicone, can have 3 of them up at once. Ubuntu shouldn't be near the hog of ram or cpu that Windows is.

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